分类： 信息化
2014-04-15 15:37:22
Contact is the key to the original inside off contact mundane action can be about 50 times a day, if pure copper contacts, then simply do not achieve the high life off under the impact of the current arc; to achieve high and over the life of the rated current, the contacts must be a certain thickness of the silver-level contacts; pressure arc of silver and anti-shock ability is relatively much higher than copper, the price of silver is relatively much higher than copper, so if you use silver The fewer the lower price. There with this structure is about the same, the principles are basically the same, just not the same function, generally use more in the refrigerator.
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